85804585431 has 4 divisors (see below), whose sum is σ = 114406113912. Its totient is φ = 57203056952.

The previous prime is 85804585393. The next prime is 85804585457. The reversal of 85804585431 is 13458540858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85804585431 - 2⁷ = 85804585303 is a prime.

It is a super-2 number, since 2×85804585431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85804585481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14300764236 + ... + 14300764241.

It is an arithmetic number, because the mean of its divisors is an integer number (28601528478).

Almost surely, 2^85804585431 is an apocalyptic number.

85804585431 is a deficient number, since it is larger than the sum of its proper divisors (28601528481).

85804585431 is a wasteful number, since it uses less digits than its factorization.

85804585431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28601528480.

The product of its (nonzero) digits is 3072000, while the sum is 51.

The spelling of 85804585431 in words is "eighty-five billion, eight hundred four million, five hundred eighty-five thousand, four hundred thirty-one".